Bolt-clipper



NO. 751302. PATENT H. K. PORTER. ED FEB z, 1904.

BOLT CLIPPER.

APPLICATION FILED JUNE 29,1903.

2SHEETSSHBET 1.

N0 MODEL.

No. 751,202. PATENTED FEB. 2, 1904.

H. K. PORTER.

BOLT CLIPPER.

. APPLICATION FILED JUNE 29, 1903. H0 MODEL. 2 SHEETSSHEET 2.

UNITED STATES Patented February 2, 1904.

HENRY K. PORTER, OF CHELSEA, MASSACHUSETTS.

BOLT-CLIPPER.

SPECIFICATION forming part of Letters Patent No. 751,202, dated February2, 1904.

I Application filed June 29, 1903. Serial No. 163,451. (No model.)

To all whom it may concern:

Be it known that LHENRY K. PoRTER,a citizen of the United States,residing at Chelsea, in the county of Suffolk and State ofMassachusetts, have invented a new and useful Improvement inBolt-Clippers, of which the following is a specification.

My invention relates to the adjustment of the cutters in bolt-clippers,and has for its object to provide improved means for adjusting themovement of the cutting-blades to and from each other, so as tocompensate for the variations thereof arising from wear of the same inthe ordinary use of the tool; and I attain said object by means of thedevices illustrated in the accompanying drawings, in which Figure 1 is aplan or side view of a bolt-clipper embodying my invention with theouter end of the handles broken ofi Fig. 2 is an edge view of the same.Fig. 3 is an enlarged cross-section taken as on line as 00, Fig. 1. Fig.4, 5, 6, 7, 8, 9, 10, 11, 12, and 13 are side and top views of theeccentric bolts by which the handles and cutter-levers are jointedtogether and variously toothed or notched to interlock withcorresponding notches in the edges of annular bosses on the handles.

The preferred form of such interlocking clevices for adjusting therelations of the handles and cutter-levers through the eccentricity ofthe connecting-bolts is shown in Figs. 1, 2, 6, and 7, although themodifications thereof, as shown in other figures, may be practicallyused with substantially the same results and without departing from theprinciple involved in the construction preferred.

Outside ofthe method shown of hinging or jointing the cutter-levers A Aand handlelevers B B together by means of eccentric bolts 1) the tool isthe same as heretofore made and patented by me. As shown in Fig. 7 thebolts each have a threaded part a, an eccentric portion 6, an enlargedconcentric part c, and a hexagonal head (Z, having teeth or notches e inits under side. Referring to Fig. 3, it will be seen that the bolts whenin place pass through the forks of the handlelevers B and B, thecutter-levers A and A, and are secured by nuts C and C, threadedthereon, the eccentric part b of the bolt fitting a hole in thecutter-lever, while the parts a and c fit holes in the handle-lever.Upon one side each of the handle-levers have hollow bosses E E, thecircular edges or rims of which are notched,as shown,and these notches Fconfront the notches c of the bolt-head and interlock therewith toprevent the bolt when actuated by the handles from turning about its ownaxis and disturbing the relative position of the eccentric part b whenthe clipper is adjusted in that respect, and it is further secured byturning nut C against the opposite smooth-faced boss G. By slacking thenut and partly withdrawing the bolt far enough to disengage the teeththe bolt may be turned one or more notches, thereby changing theposition of the eccentric part in its cutter-lever and the relation ofsuch lever to the handlelever. Thus the ends of the cutter-levers may beset nearer together or farther apart, accordingly as the bolt is turned,to the extent of a half-revolution, and through their pivoted levers theopening and closing of the cutting-blades H and H are efiectedaccordingly. This is a very convenient and effective method of adjustingthe relations of the cutting edges H and H under the various changeswhich arise from the wear of the tool in practical use. 7 While thismethod of adjustment is shown as applied only to the two outer joints Dand D it might also be applied to the middle or handle-lever joint D andthus eifect a compound adjustment in a finer degree of the cutters; butsuch adjustment of the two outer joints is thought to be practicallysufficient.

The modifications shown are confined to the devices by which the boltsand handle-levers are interlocked to secure the adjustments desired andmay be described, briefly, as follows: In Figs. 4 and 5 are shown viewsof a bolt D, the circular head cl of which has teeth formed thereon, soas to interlock with teeth on the handles formed around the interioredges of a circular recess B in the handle, as shown in Figs. 12 and 13,and in Figs. 8, 9, 10, and 11 are shown an end and side view of aneccentric bolt having a hexagonal head (Z adapted to interlock itscorners with the angles formed around a recess B in the handles.

bolts being adapted to adjustably interlock with suitable teeth providedon the handles, for the purposes specified.

2. In a bolt-clipper, the combination of a pair of cutter-levers; a pairof handle-levers; a pair of eccentric bolts by which the two pairs oflevers are jointed together the bolts and handle-levers being providedwith confronting teeth which adjustably interlock and prevent theturning of the bolts as specified.

HENRY K. PORTER.

WVituesses:

EUGENE HUDHHREY, JAMES F. DE CAsTRo.

